Adoption is the Gospel

"[Adoption is] the whole story of redemption. The universe was meant to be a home- where the image bearers of God rule and serve under their Father. It was all to be ours. The primeval insurrection in the garden, though, turned the universe into an orphanage- the heirs were gone, done in by their appetites. A serpent now holds the cosmos in captivity, driving along the deposed rulers as his slaves. The whole universe is now an orphanage.

But then there's Jesus.

When we were still orphans, Christ became a substitute orphan for us. Though he was a son, he took on the humiliation of a slave and the horror of death (Phil. 2:6-8). Jesus walked to that far country with us, even to the depths of the hog pen that we'd made our home, and hung on a tree abandoned by his Father in our place."